Consolidated Statements Of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Regular dividends per share (in dollars per share)	$ 1.00	$ 1.00
Extra dividends per share (in dollars per share)	$ 5.00	$ 5.00